LittleBig Planet Vita Online Server are now online.
If you have picked up a copy of the game early at Gamestop
you can now use the Community Features.
DLC will still be unavailable until Official release date 9/25/2012.

********UPDATE********
Advanced Notice:
PlayStation Plus features for PS Vita available in November will include:

*Instant Game Collection: Unlimited access to a regularly refreshed selection of the full versions of games as long as your membership is active.
*Discounts: Take advantage of exclusive discounts on games and DLC for your PS Vita.
*Online Game Storage: An additional 1GB of online storage for game saves for PS Vita games and downloaded content.
*Automatic Updates: PS Vita will automatically start up at a designated time to download and install select game demos and game updates as well as system software updates and start standby mode upon completion.
*Automatic Trophy sync: Trophy information will be synched to PSN servers automatically via the PS Vita.

So, If you have a PSVita and still are not on PlayStation Plus, you might want to really consider it.